Bumper bar



w; v. ISGRIG.

BUMPER BAR.

APPLICATION FILED SEPT. 15'. 1919.

1 A4t 359... Patented Aug'rll, 1922.

TENT oerlee.

WALTER V. ISGRIG, OI MILWAUKEE, WISCONSIN, ASSIGNOR TO BADGER MANUFAC- "I'UBING CORPORATION, 015 MILWAUKEE, WISCONSIN, A CORPORATION 015 .DEJLA- wean Specification of Letters Patent.

Bmnrnn B.

, Patented Aug. 1., 1922.

I Application filed September 15, 1919. Serial No. 323,902.

'To an whom it may concern:

Be it known that I, WALTER V. ISGRIG a citizen of the United States, residing-at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Bumper Bars, of which the following is a specification.

This invention relates toa bumper bar.

One of the objects of this invention is to prgvide a tubular bumper bar having sealed en s. I

A further object is to provide a tubular bumper bar which may. be electroplated,

enameled or otherwise coated without danger of the liquids entering the tubular bumper bar.

Fig. 1 is, a top plan of a bumper bar with a ortion of the supporting brackets.

30. and in dotted lines the form it assumes at ig. 2 is a vertical section on line 2-2 of Fig. 1. i

, Fig. 3 is an end pers active-of the bumper bar, showing in full lines the finished end an intermediate stage in its manufacture.

Figs. 4 and 5 are perspectives of other forms of bumper bar ends.

Fig. 6 is a section through another form of bumper bar end.

Thebumper bar is formed of tubing, preferably seamless tubing, which, although. shown as of rectangular cross section, may

be of hexagonal, octagonal, circular, or other cross section.

Fig. 1 shows the complete bumper bar 1 as it appears when mounted in the supporting brackets 52. i j

Fig. 3 shows one form of sealed end 3.

' The tubular bar, after being cut to the cor- 'rect length is slitted, or cut at the end, so as to form a plurality of flaps 4:, as shown in dotted lines. The flaps are then bent inwardly, into juxtaposition, as indicated in full lines, and the adjacent edges joined by brazing, soldering, welding, or in any other manner to effect a complete sealing of the ends. The flaps 4 are of substantially triangular shape and may have curved edges to form a rounded pyramidal end.

Fig. 4 shows another method of forming a sealed end. The bar is slit'at the ends and the pair ofedges 5 are given a rounded outline. Thefiaps' 6 are left in their rectangular shape, as shown in dotted lines, and are subsequently bent inwardly so that their edges 7 lie adjacent-each other and the edges 8 adjacent the edges of the flaps 5. Thereafter all the edges are joined by any suit-v able method such as described in connection with Fig. 3. v

Fig. shows a further method of sealing the ends of the bar. A single flap 9 is formed at the end of the bar and is bent inwardly. The edges of this flap are secured to the adjacent edges of the tube by any suitable method, as previously described.

Fig. 6 shows a further method of sealing the ends of the bar. A rectangular hollow cap, or plug 10 is slipped into the tube and thereafter secured in place by any suitable method, such as previously described.

The bar may be bent adjacent its ends, as shown in Fig. 1, either before or after the sealin of the ends, or else may be left straig t.

This tubular bumper bar has sealed ends of neat and attractive appearance. Also, such a bar may be electroplated, enamelled or otherwise coated without danger of the solutions entering the interior of the tubular bar.

Obviously other structures may be devised which will embody the, invention herein set forth.

What I claim is,-

1. A bumper bar having a seamlesstubular body and structurally integral end portions folded together and secured by molecular adhesion to provide a hermetically sealed body.

- 2. A bumper bar comprising a seamless hollow body, and ears formed on the ends of and integral with said body, said ears be ing bent at substantially right angles to the axis of the bumper bar and joined by molecular adhesion to prevent ingress of moisture to the interior of the bar.

3. A bumper bar comprising a seamless tubular casing, a plurality of cars formed on the ends of said easing and bent over et substantially right angles to thegbody of the bumper, said ears being Welded together to form a hermetically sealed casing.

4. A tubular bumper her having end closing members molecularl united thereto so as to hermetic-ally seal t e same.

5. A tubular bumper bar having end plates closing the ends thereof and molec- WALTER v. ISGRIG. 

